v6.5.1 STABLE

80790bd#diff-1cd2648e454d44c8ae4f40828dc45bfa

seq.evalEqs = (val) => {
    const val0 = val;
    seq.eqs.map((eq) => (val = eq(val)));
    return (seq.us.length === 0) ? val0 : val;
  };        

test3.js

       const __a = __(); //constructor
        const __d = __a
          .__((x) => (__.log.t = x + 1));  //10

        __a.t = 9;
        __.log.t = __a.t;  // 9